Door-operating device



June 11, 1929; CASHMAN DOOR OPERATING DEVICE 2 Sheets-Sheet Filed Jan.24, 1928 Junell, 1929. A.A.'AsHMA- 1,716,684

DOOR OPERATING DEVICE Filed Jan. 24, 1928 2 Sheets-Sheet 2 Patented June11, 1929.

usrrso stares ATHOL ALONZO' CASHMAN, OF GLENYVOODVILLE, ALBERTA, CANADA.

DOOR-OPERATING DEVICE.

Application filed January 2-1, 1928. Serial No. 249,165.

This invention relates to in'iprovemonts in door operating device andmore particularly to devices of this description operated by compressedair and the objects of the invention are to provide a simplyconstructed, durable door operating device adapted for country grainelevators and which also can be used with great advantage on warehousesliding doors. in country elevators, as is well known, it is necessaryas a precautionary measure to close the doors while unloading grain;this means that they must be opened and closed once for each load ofgrain, necessitating a considerable distance being travelled by theoperator for each time the doors are opened and closed, with consequentloss of time and unnecessary labor for the operator.

Most modern country elevators are equipped with air dumps which providean air line passing by the operators desk, and in the present inventionthis air line has been utilized to co-ordinate and operate theapplican'ts improved door operating mechanism, thus avoiding thenecessity of having an extra compressor or tank.

lVith the foregoing and other objects hereinafter more fully referredto, the invention comprises a combination with compressed air means ofdoor operating means associated therewith and operable thereby.

Referring now to the drawings in which.

like characters of reference indicate corresponding parts in eachfigure:

Fig. 1 is a side elevation of a sliding door fitted with my improvedoperating device.

Fig. 2 is a similar view to Fi 1, showing the sliding doors open.

Fig. 3 is an enlarged section on the line 33 of Fig. 1.

Fig. 4 is a perspective view of the piston rod guide.

Fig. 5 is a perspective view of the oil set on the pull rod.

From the foregoing it will be clear that my invention consists in themechanism between the compressed air means intermediate of the operatingmeans and the door to be operated thereby.

Referring now more particularly to the drawings in which a preferredexample of my invention is disclosed 10 and 11 are door sectionsslidably mounted in any well-known manner on a supporting member 12, toform a closure for the door opening 13 of an elevator or warehouse. InFig. 2 these door sections 10 and 11 are disclosed in open position, andin Fig. 1 are shown in closed position.

For operating these doors from a distance and withouthaving to handlethem, in the present example I disclose operating means associated withan air line 14, comprising a compressed air cylinder 15 connected to theair line 14 and sliding through a side line in any well known manner notshown. A piston rod 16 of the cylinder 15 is secured at its outer end asat 17 to a cross slip 18. This member 18 also forms a guide for thepiston rod, and

is riveted as at 19 to a draw bar 20. Pivotally mounted on each end ofthe draw bar 20 are links 21 and 22. These links in turn are pivotallyconnected at 23 and 2 1 to lever arms 25 and 26, in turn pivotallyconnected at 27 to door operating rods 28 and 29, in turn pivotallyconnected at their lower ends as at 30 to short lever arms 31 to theoffset ends 32 of the rods 33 and 3 1, these rods being pivotallymounted at 35 and 36 in the shackles 3? and 38 on the doors lOand 11.Pivotally mounted braces 39 and 10 connect the rods 28 and 29 to thelevers 25 and 26.

These rods 28 and 29 are also pivotally con nected to one another at thetop by a double cross link 41, this link forming a guide for the guiderod 12 in the upward or downward travel of piston 16. The connectionbetween the operating rods 28 and 29 to the pull rods 33 and 3 1 is bymeans of the lever arms 31 as disclosed in Fig. 5, the shackles 37 and38 formed with two pieces of metal bolted together, one end of which isoffset as at 43 thereby forming a free joint for the pull rods 33 and341.

It will be seen from the foregoing that on the piston rod movingdownwardly, the operating rods 28 and 29 will gradually assume avertical position drawing the doors 10 and 11 inwardly to the closedposition as inclivated in. Fig. 1, while on the inward stroke of thepiston rod the rods 28 and 29 will be drawn upwardly automaticallythrough the pull rods 30 and 31 moving the doors 10 and 11 along theirtrackway on the link 12 to an open position indicated in Fig. 2;

It will therefore be evident that the operator sitting at his desk hasonly to open and close the valves 44 and 15 to turn on the compressedair to open and close from a distance the door sections 10 and 11.

As many changes could be made in the above construction, and manyapparently widely different embodiments of my invention, Within thescope of the claim, constructed Without departing from the spirit orscope thereof, it is intended that all matter con tained in theaccompanying specification and drawings shall be interpreted asillustrative and not in a limiting sense.

hat I claim as my invention is A door operating device comprising incombination, a door, a pull rod, an operating rodpivotally connected tothe pull rod, a cross bar, a lever arm pivotally connected to theoperating rod and to the cross bar, a brace pivotally connected to thelever arm and to the operating rod, and means for causing the cross barto move upwardly and downwardly whereby the operating rod is drawnupward ly to cause the pull rod to assume a horizontal position andautomatically cause the door to move outwardly, and whereby theoperating rod assumes a vertical position exerting pressure on the pullrod to move it downwardly and cause the door to move inwardly to closedposition.

In Witness whereof I have hereunto set my hand.

ATHOL ALONZO CASHMAN.

